http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Guo, Huangying,Kim, Jin-Chul MARCEL DEKKER JOURNALS 2017 JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY Vol.38 No.11
<P>Reduction-responsive vesicle was prepared by salt-bridging N-[3-(dimethylamino)propyl]-octadecanamide (DMAPODA, a cationic amphiphile) using 3,3-dithiodipropionic acid (DTPA, a disulfide diacid compound). According to the transmission electron micrograph and the fluorescence quenching degree (53.2%), it could be said that vesicles were formed when the DMAPODA to DTPA molar ratio was 2:2. The DMAPODA/DTPA associate was considered to be a building block for vesicle formation because DTPA could electrostatically associate with DMAPODA and help the cationic amphiphile assemble into the vesicle. On a differential scanning calorimetric thermogram, the DMAPODA/DTPA vesicle showed two endothermic peaks at 50.6 degrees C and 63.2 degrees C. The peak found at the lower temperature was possibly due to the solid gel-to-liquid crystal phase transition of the vesicular membrane and the peak found at the higher temperature was considered to be due to the melting of DMAPODA, indicating that unassociated DMAPODA coexisted with DMAPODA/DTPA vesicles. The release of calcein enveloped in the vesicle was promoted by DL-dithiothreitol, possibly because DTPA can be broken by the reducing agent to form mercaptopropionic acids and the vesicle could be disintegrated and/or the vesicular membrane would become defective.</P>
Rare Earths Extraction, Separation, and Recovery from Phosphoric Acid Media
Reddy, Bontha Ramachandra,Kumar, Jyothi Rajesh MARCEL DEKKER JOURNALS 2016 SOLVENT EXTRACTION AND ION EXCHANGE Vol.34 No.3
<P>Rare earths (REs) recovery and processing becomes most important all over the globe due to their versatile applications in modern life. The present general article discusses REs extraction and possible separation and recovery methods from phosphoric acid media. Leaching studies are discussed followed by two extraction techniques: solvent extraction and solid-liquid extraction. Various extractants such as TOPS 99 (or) D2EHPA, Cyanex 272, PC 88A were tested for REs extraction and separation. Three resins, Tulsion T-PAR, CH-96, and CH-93, as well as impregnated TOPS 99 were utilized for solid-liquid extraction studies.</P>